Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2020   22:39:48   (  -0.04,-137.22) (  -0.08,-137.31)   11.79                80
 01/18/2020   10:42:24   (   0.04,-137.21) (   0.19,-137.94)   82.56                80
 01/19/2020   10:20:49   (   0.04,-137.21) (  -0.84,-133.37)  438.61                80
 01/20/2020   22:45:08   (  -0.05,-137.20) (  -0.36,-138.60)  158.64                80
 01/21/2020   22:23:32   (  -0.05,-137.20) (   0.67,-134.02)  362.22                80
 01/23/2020   10:47:43   (   0.06,-137.19) (   0.51,-139.21)  231.32                80
 01/24/2020   10:26:07   (   0.06,-137.18) (  -0.51,-134.64)  289.13                80
 01/25/2020   22:50:27   (  -0.06,-137.16) (  -0.69,-139.87)  309.14                80
 01/26/2020   22:28:51   (  -0.06,-137.15) (   0.34,-135.29)  211.23                80
 01/28/2020   10:53:01   (   0.07,-137.13) (   0.84,-140.49)  382.77                80